Connecting-rod and plunger connection



G. L. FISH CONNECTING ROD AND PLUNGER CONNECTION Fil ed March 1, 1923 620E521?! FISH.

By W, @5414 i W 4 ATTORAEYS. V

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' csonen L. FISH, OF'LONG BEACH, cALiroRNIA, Assrenon 'ro RAYMOND SALISBURY,

- TRUSTEE, or OAKLAND, CALIFORNIA.

' CONNECTING-ROD AND PLUNGER CONNECTION.

Application filed March 1, 1923. Serial No. 622,101.

This invention relates to a connecting rod in this instance formed as an integral part and plunger connection for high pressure and as such produces an exceedingly rigid pumps, compressors and the like. and substantial structure. The end of the The object of the present invention is to plunger indicated at 2 is enlarged to form 5 generally improve and simplify structures a bearing head 9 and this is recessed as at 10 ofthe character described, and especially to to receive the upper half of the wrist pin 7. form an oscillating connection between the The head is otherwise perforated or drilled pump plunger and the connecting rod whereas indicated at 11 to receive two or more by a compact rigid structure and large bearbolts or screws 12 and these are'employed 60 10 ing areas are obtained. Further objects will for the purpose of securing a pair of side hereinafter appear. strips such as indicated at 13. The inner One form which my invention may assume faces of these strips are slightly rounded to is exemplified in the following description receive the lower half of the wrist pin and and illustrated in the accompanying drawto prevent disconnection of the wrist pin and 6 15 ings, in which the plunger.

Fig. 1 is a side elevation of a pump partly The shortened connecting rod 6 has a in section showing the application of the width equal to the bearing 5, and the length invention. of the wrist pin 7 is the same. The head 9 Fig. 2 is a detail end view'of the connecof the plunger rod is, therefore, enlarged tion formed between the plunger, the crank and lengthened to cooperate therewith and pin bearing and the connecting rod. bearing areas of large proportions are thus In'certain machine installations high presobtained when comparison is made with the sure pumps, compressors, etc., are employed, diameter of the pump plunger 2, that is, a and where the pressures exceed 1000 pounds crank shaft of large diameter and short Y or more per square inch rigid structures and stroke can in this instance be readily conlarge bearing areas are required to stand the nected to a plunger of fairly small diameter, stresses and loads to which the parts are thus making it possible to produce pressures subjected. In most installations of this running into several thousand pounds to the character rigid plunger rods-are employed square inch without showing any tendency 8O and considerable difliculty is encountered after continuous running to heat the bearwhen a connection is formed between the ings. plunger and the connecting rod. In the lVhile certain features of the present inpresent instance a bearing of large' area is vention are more or less specifically illusformed between the plunger and the contrated, I wish it understood that various 35 necting rod and a rigid compact structure is changes in form and proportion may be reat the same time obtained. This is accomsorted to within the scope of the appended plished as follows: claim, similarly that the materials and fin- A indicates the cylinder of a pump or a ish of the several parts employed may be compressor, and 2 a plunger which is resuch as the experience and judgment of the i ciprocally mounted therein. Disposed in manufacturer may dictate or various uses alignment with the plunger is a crank shaft may demand.

' 3 from which reciprocal movement is trans- Having thus described my invention, what mittedto the plunger. This is accomplished I claim and desire to secure by Letters Patas follows: Surrounding the crank pin of ent is 45 the shaft 3 is acrank pin bearing which The combination with the upper half of a consists of two sections such as indicated at crank pin bearing, of a shortened connecting 4i and 5. The section 5' isslightly extended rod formed integral therewith and having as shown at 6 to form a shortened connecting awidth equal to the length of the bearing,

rod which terminates in a wrist pin 7. The a wrist pin formed integral with the short- 50 connecting rod, the bearing 5 and the interened connecting rod and also havingalength mediate or shortened section of the rod, are equal to that of the crank pin bearing, a

plunger of proportionately small diameter secured thereto, said strips engaging the an enlarged head thereon having a length lower half of the Wrist pin and preventing equal to the crank pin bearing, a semi-circuremoval thereof but permitting oscillating lar seat extending from end to end of the movement of the Wrist pin the rod and the head and adapted to receive the upper half hearing.

of the wrist pin, and a pair of strips eX- tending lengthwise of the plunger head and GEORGE L. FISH. 

